AntFile[AntTask.ant]
  AntProject[project]
    AntTarget:[A]
      AntElement[PsiElement(XML_ATTRIBUTE_VALUE)]('A')
    Ant[subproject/property_based_subbuild.xml]
      AntProperty[param1 = version 1.x]
        AntElement[PsiElement(XML_ATTRIBUTE_VALUE)]('param1')
      AntProperty[property = null]('<property file="config/subproject/default.properties"/>')
    Ant[build.xml]('<ant/>')